JP2002090828A - Stroboscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stroboscopic device capable of surely reducing impact applied to a camera body at the finish of its erection. SOLUTION: The device is provided with a stroboscopic body rotatably supported by the camera body and incorporated with at least a strobe flashing part, an arm whose one end is rotatably attached to the stroboscopic body and whose another end has a cam engagement part, a guide member, which is movable attached to the camera body and has a cam part with which the cam engagement part of the arm is engaged, an arm-energizing means for energizing the arm in the rotating direction, and a guide member energizing means for energizing the guide member in the moving direction. The cam part of the guide member has a shape with the stroboscope body being rotated in the direction of erecting according to the rotation of the arm by the arm- energizing means, thus the angle formed by the intersection of the moving direction of the cam-engaging part which moves along the cam part and the axial direction of the arm is set to nearly 90 deg. or 90 deg. at the position just, immediately before the stroboscope main body is erected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pop-up type flash device.

[0002]

2. Description of the Related Art A pop-up type strobe device mounted on a camera has a structure in which a strobe light emitting portion is built in and a rotating position between a standing position in a used state and a storage position in a non-used state with respect to the camera body. . Such a strobe device can be erected at a position far from the lens and emit light from its light-emitting portion during use without impairing the portability of the camera. However, the strobe device has a problem in that an impact is applied to the camera body at the time of pop-up due to standing up.

For this reason, the present applicant has proposed a strobe device (Japanese Patent Laid-Open No. 6-95) for reducing the impact at the time of pop-up.
219) has already been filed.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method disclosed in
It is an object of the present invention to provide a strobe device which has a structure different from that of the invention of Japanese Patent Application Laid-Open No. 95219 and which can surely reduce the impact on the camera body at the time of completion of standing.

[0005]

A strobe device according to the present invention is a pop-up type strobe device which rotates between a standing position in a used state and a storage position in a non-used state with respect to the camera body. A strobe body having at least a built-in strobe light emitting unit rotatably supported;
An arm having one end rotatably attached to the strobe body and having a cam engaging portion at the other end, and a cam portion movably attached to the camera body and engaged with the cam engaging portion of the arm. A guide member having an arm urging means for urging the arm in the direction of rotation thereof, and a guide member urging means for urging the guide member in the direction of movement thereof. The cam portion has a shape for rotating the strobe main body in the rising direction in accordance with the rotation of the arm by the arm urging means, and cam engagement of the arm end portion at a position immediately before the strobe main body is raised. In a portion corresponding to the portion, the angle at which the moving direction of the cam engaging portion moving along the cam portion and the axial direction of the arm intersect is approximately 90 ° or 90 °. is there.

According to such a configuration, the arm in which the cam engaging portion at the end is engaged with the cam portion having the specific shape of the guide member is rotated by the arm urging means, so that the strobe main body is popped up. The impact speed applied to the camera body can be reliably reduced by slowing down the rotation speed of the strobe just before the standing.

When the strobe main body is manually rotated from the standing position to the storage position, the guide member is moved against the urging force of the guide member urging means, and the cam at the end of the arm is moved. Since the engaging portion can be moved in the direction (storage position direction) opposite to the direction in which the engagement portion moves along the cam portion, the turning operation of the strobe body in the storage direction can be performed smoothly.

Another strobe device according to the present invention is a pop-up type strobe device which rotates between a standing position in a used state and a storage position in a non-used state with respect to a camera body. A strobe body that is pivotally supported and has at least a built-in strobe light emitting unit and has a cam portion, a first arm movably attached to the camera body, and one end rotatably attached to the first arm, A second arm having a cam engaging portion engaged with the cam portion at an end, a first urging means for urging the first arm in a moving direction thereof, and a rotating direction of the second arm in the rotating direction; And a second urging means for urging the strobe body, wherein the cam portion of the strobe main body is provided with the second urging means by the second urging means.
The strobe body is turned in the upright direction in accordance with the rotation of the arm, and the cam is provided at a position corresponding to a cam engaging portion of the second arm end just before the strobe body stands up. The angle at which the moving direction of the cam engaging portion moving along the portion and the axial direction of the second arm intersect is substantially 9
It is characterized by having a shape of 0 ° or 90 °.

According to such a configuration, the second cam engaging portion of the end portion is engaged with the cam portion of a specific shape of the strobe main body.
By rotating the arm by the second urging means,
The impact speed applied to the camera body can be reliably reduced by slowing down the rotation speed of the strobe at a position immediately before standing up by the pop-up of the strobe body.

When the strobe main body is manually rotated from the standing position to the storage position, the first arm is moved against the urging force of the first urging means, and the strobe main body is raised. Since the cam engaging portion of the second arm end just before the position can be moved in the opposite direction (storage position direction) to the direction in which it moves along the cam portion, the strobe body can be turned in the storage direction. The moving operation can be performed smoothly.

[0011] Still another strobe device according to the present invention includes:
In a pop-up type flash device that rotates between a standing position in a used state and a storage position in a non-used state with respect to a camera body, the flash body is rotatably supported by the camera body, and includes at least a strobe light emitting unit and a cam. A strobe main body having a portion, a first arm rotatably attached to the camera main body, and one end engaged with the first arm so as to be rotatable together with the first arm and movable in one direction,
A second end having a cam engaging portion engaged with the cam portion at the other end;
An arm, a first urging means for urging the one arm in a rotation direction thereof, and a second urging means for urging the first and second arms in a direction of separating the first and second arms from each other in the moving direction.
Biasing means, wherein the cam portion of the strobe main body rotates the strobe main body in the upright direction in response to the rotation of the second arm engaged with the first arm by the first biasing means. A moving direction of a cam engaging portion that moves along the cam portion at a portion corresponding to the cam engaging portion of the second arm end just before the strobe main body stands up and the second The angle at which the axis of the arm intersects is approximately 90 °
Alternatively, it is characterized by having a shape of 90 °.

According to such a configuration, the first arm which is rotatably attached to the camera body and is movable in one direction, and one end of which is rotatable together with the first arm in one direction. A second arm having a cam engaging portion at the other end engaged with a cam portion of a specific shape of the strobe main body, and a second arm engaged with the first arm being a first arm. By rotating the flash by the urging means, the rotation speed of the flash at the position immediately before the flash is raised by the pop-up of the flash main body can be reduced, and the impact force applied to the camera main body can be reliably reduced.

When the strobe body is manually rotated from the upright position toward the storage position, the second arm is moved against the urging force of the second urging means, and the upright position of the strobe body is raised. Since the cam engaging portion of the second arm end just before can be moved in the direction opposite to the direction in which it moves along the cam portion (toward the storage position), the strobe main body is rotated in the storage direction. The operation can be performed smoothly.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a strobe device according to the present invention will be described in detail.

(First Embodiment) FIG. 1 is a perspective view showing a camera in which a strobe device according to the first embodiment is incorporated, and FIGS. 2A to 2D show a strobe main body of the strobe device. FIG. 3 is a cross-sectional view showing a process of moving the flash body from the standing position to the standing position and a process of moving the strobe main body from the standing position to the storage position by pressing. FIG.

A single-lens reflex camera shown in FIG. 1, for example, has a camera body 10, a strobe body storage section 20 formed in the camera body 10, and a storage section 20 in the storage section 20 when the camera body 10 is not used. And a pop-up type strobe device 30 which can be turned upright in a use state.

At the center of the front surface of the camera body 10, a lens barrel 11 is provided. The release button 12
It is attached to the front right end of the camera body 10 as viewed from the rear side.

The strobe main body storage section 20 is formed to be inclined above the lens barrel 11 of the camera main body 10. A pair of notches 21 in which the paired arms and the triangular plate-shaped guide member, which will be described later, constituting the strobe device 30 are located,
Are formed parallel to each other at a desired distance from each other.

The strobe device 30 has a strobe main body 32 having a window 31 with a built-in strobe light emitting section at the upper front.
It has. The lock claw 33 is attached to the inclined inner surface of the strobe main body storage section 20. The lock claw engaging portion 34 engaged with the lock claw 33 is provided in the window 3
It is formed in the portion of the strobe main body 32 located below the strobe body 1. The lock claw engaging portion 34 and the lock claw 3
Lock release switch 35 for releasing the engagement with 3
Is attached to the camera body 10 adjacent to the storage section 20.

The flash main body 32 is rotatably supported by the camera main body 10 via a shaft 35 as shown in FIGS. The pair of arms 36 are respectively positioned so as to be parallel to and opposed to the pair of cutout grooves 21 formed in the strobe main body storage section 20. First
The rotating shaft 37 is mounted on the strobe main body 32 in the width direction, and both ends of the rotating shaft 37 are supported by one end of each of the arms 36. As shown in FIG. 3, the pair of first torsion springs 38, which are arm urging means,
Are wound around the first rotation shaft 37 located between both side surfaces of the arm 36 and the arms 36, respectively. One end 38a of the first torsion spring 38 has the strobe body 3
2 is locked by a pin 39 that protrudes horizontally from the side surface,
The other end 38b is inserted into the arm 36. Each of the arms 36 has a cam engaging pin 40 at the other end. First torsion spring 38 attached to the first rotation shaft 37
Urges the arms 36 in the counterclockwise direction, for example, with their cam engaging portions 40 as fulcrums, and the urging force is maximized at the storage position of the strobe main body 32.

For example, a pair of guide members 41 in the form of a right-angled triangular plate are respectively positioned so as to be parallel to and opposed to a pair of cutout grooves 21 formed in the strobe main body storage section 20. The second rotating shaft 42 is axially mounted on the camera body 10 located between the pair of cutout grooves 21, and near both ends thereof, acute angle corners of the guide members 41 are formed. It is pivotally supported so as to be located on the upper side. As shown in FIG. 3, the pair of second torsion springs 43, which are guide member urging means, are located between both side surfaces of the camera body 10 located between the pair of notched grooves 21 and each of the guide members 41. It is wound around the second rotation shaft 42, respectively. One end 43a of the second torsion spring 43 is locked by a pin 44 protruding horizontally from the camera body 10 and the other end 4a.
3b is inserted into the guide member 41. The second
The second torsion spring 43 attached to the rotation shaft 42
The guide members 41 are urged in a clockwise direction, for example, with the second rotation shaft 42 as a fulcrum. At this time, a stopper is provided so that the guide member 41 stops at the position shown in FIG. For example, a linear cam portion (cam groove) 45 with which the cam engaging pin 40 of the arm 36 is engaged.
Is formed on each of the guide members 41 having the shape of a right-angled triangular plate so as to extend along the longest side of each of the guide members 41. In these cam grooves 45, the ends located on the side of the second rotation shaft 42 are located immediately before the strobe main body 32 rises, where the rising rotation speed approaches zero as much as possible. Specifically, the end of the cam groove 45 in which the cam engaging portion 40 of the arm 36 is located just before the strobe main body 32 stands in the cam groove 45 depends on the moving direction of the cam engaging pin 40 and The arm 36 is located at a position where the angle of intersection with the axial direction is 90 °. Here, the angle is an angle (θ) at which a moving direction (dashed line) of the cam engaging pin 40 shown in FIG. 5 described later intersects a line extending from the cam engaging pin 40 in the axial direction of the arm 36. ).

The second torsion spring 43 has a sufficiently large spring force as compared with the first torsion spring 38.

Next, the operation of the flash device according to the first embodiment will be described with reference to FIGS. 1 and 2A to 2D, 3 and 4 to 6. FIG.

In the state in which the strobe main body 32 shown in FIG.
A pair of first torsion springs 38 wound around the rotation shaft 37
Is applied to rotate the pair of arms 36 in the counterclockwise direction about the rotation shaft 37, and the cam engagement pin 40 at the other end of the pair of arms 36 is the second rotation shaft of the guide member 41. It is located at the end (left end) of the cam groove 45 distant from 42.

When the lock release switch 35 shown in FIG. 1 is operated in the state shown in FIG. 2A, the engagement between the lock claw 33 of the strobe body storage section 20 and the lock claw engaging section 34 of the strobe body 32 is established. Is canceled. When the engagement is released, the pair of arms 36 by the pair of first torsion springs 38 wound around the first rotation shaft 37 are rotated counterclockwise around the cam engagement pins 40 as fulcrums. Energizing force works. This urging force does not directly act on the shaft 35 (rotation center) of the strobe main body 32 as shown in FIG.
The arm 3
In order to cause the rotational force of (6) to act as a rotational force about the shaft 35 of the strobe main body 32, the movement of the cam engaging pin 40, which is the rotation center (fulcrum) of the arm 36, that is, the movement of the cam groove 45 of the guide member 41 Involves moving along. In other words, the rotational force of the arm 36 is not transmitted as the rotational force of the strobe main body 32 unless the fulcrum of the arm 36 moves.

Specifically, the engagement between the lock claw 33 and the lock claw engagement portion 34 of the strobe main body 32 is released, and a pair of first torsion springs 38 wound around the first rotation shaft 37 are provided. When the urging force for rotating the pair of arms 36 in the counterclockwise direction with the cam engagement pins 40 as fulcrums acts on the pair of arms 36, the rotation transmitting force to the strobe body 32 due to the above-described rotational force of the arm 36 and the fulcrum of the arm 36 As shown in FIG. 2B, the strobe main body 32 is rotated about a shaft 35 which is attached to the camera main body 10 as shown in FIG. 2B from the relationship with the movement of the cam engaging pin 40 along the cam groove 45. 2C, and finally to a standing position shown in FIG. 2C, and the cam engaging pin 40, which is the rotation center (fulcrum) of the pair of arms 36, is guided by the guide member. 41 from the second rotating shaft 42 Reach the cam groove 45 ends which close the cam groove 45 end of the second turning axis 42 along the same cam groove 45 from the (left) (right). Since the position where the cam engaging pin 40 reaches the end (right end) of the cam groove 45 is set at a position where the angle (θ) between the axial direction of the arm 36 and the cam groove 45 is 90 °, the arm The rotational transmission force to the flash body 32 due to the rotational force of 36 becomes effectively zero.
With respect to the unit rotation angle of the arm 36, the flash body 32
The angle of rotation decreases with standing and finally reaches zero. That is, the rotational force of the flash main body 32 about the axis 35 as the rotation center approaches zero as much as possible, and as a result, the flash main body 32
The impact on the camera body 10 due to the rotation of the camera can be reliably reduced.

In the above-mentioned strobe device 30, the rotational force of the arm 36 and the rising force of the strobe main body 32 increase with the movement along the cam groove 45 formed on the guide member 41 of the cam engaging pin 40 which is the fulcrum. Can be done.

The lock claw 33 and the strobe main body 32
Is disengaged from the lock claw engaging portion 34, and the pair of arms 36 formed by the pair of first torsion springs 38 wound around the first rotating shaft 37 are disengaged using the cam engaging pins 40 as fulcrums. When the biasing force to rotate clockwise works,
The force R ⁰ acting on the cam engaging pin 40 generated by the force F acting on the cam groove 45 by the cam engaging pin 40 and the strobe body 3
FIG. 5 shows the force R ¹ for erecting 2.

The moment by the first torsion spring 38 of the arm 36 shown in FIG. 4 is M, the moment in the rising direction of the flash main body 32 is M ', the length of the arm 36 is L, and the axial direction of the arm 36 is Assuming the angle formed by the cam groove 45, the force F is represented by the following equation (1), and the component force R ¹
Is represented by the following equation (2), and M ′ is represented by the following equation (3).

F = M / L (1) R ¹ = F × tan θ (2) M ′ = R ¹ × L ′ (3) Here, L ′ in equation (3) is shown in FIG. Indicates the arm length.

From the above equations (1), (2) and (3), the standing moment M 'is represented by M' = F × tan θ × L ′ (4). That is, the rising moment M ′ increases as θ increases. Therefore, the flash body 32
In the upright position, as described above, the angle θ between the axial direction of the arm 36 and the cam groove 45 is close to 90 °.
As shown in FIG. 7, a large rising moment M 'is applied to the strobe main body 32, and the strobe main body 32 can be erected to a target position. First torsion spring 38
Spring force becomes maximum at the storage position and decreases with movement in the standing position direction. However, since the rising moment M ′ has the effect of the term of tan θ from the above equation (4), the first
The torsion spring does not need to be large as compared with the case where the strobe main body 32 is directly erected by the torsion spring. As a result, space is advantageous. At this time, since the second torsion spring 43 has a sufficiently stronger spring force than the first torsion spring 38, the rotation of the guide member 41 can be prevented.

On the other hand, in order to store the strobe main body 32 in the strobe main body storage section 20 of the camera body 10 from the upright state, the top of the upright strobe main body 32 shown in FIG. Press. The strobe body 3
2 are required to meet in the storage position direction.
0 needs to move to the left end. Normally, the angle between the axial direction of the arm 36 and the cam groove 45 is 90 °.
Therefore, the strobe body 3 cannot be moved.
When the guide member 41 is pressed, the guide member 41 resists the urging force of the second torsion spring 43 by the pressing force of the cam engaging pin 40 of the arm 36 connected to the strobe main body 32 via the first rotation shaft 37. To rotate counterclockwise. As a result, the cam engaging pin 40 of the arm 36 moves along the cam groove 45 of the guide member 41 from the right end to the left end of the cam groove 45 as shown in FIG. A movement opposite to the standing operation of the strobe main body 32 occurs, and the strobe main body 32 can be smoothly stored in the strobe main body storage section 20 of the camera main body 10 by applying a relatively small pressing force.

As described above, according to the first embodiment, the impact on the camera body 10 due to the rotation of the strobe main body 32 can be reliably reduced, and the strobe main body 32 can be erected at a target position. Further, the operation of the strobe main body 32 from the standing state to the stored state can be performed smoothly only by applying a pressing force to the strobe main body 32.

Although the guide member is formed of a right-angled triangular plate in the above-described first embodiment, it may be formed of a plate having another shape such as a square.

(Second Embodiment) FIGS. 7A to 7D
FIG. 9 is a cross-sectional view showing a process in which the strobe main body moves from a storage position to a standing position in the strobe device according to the second embodiment, and a process in which the strobe main body moves from the standing position to the storage position by pressing. The same members as those in FIG. 2 described above are denoted by the same reference numerals, and description thereof will be omitted.

The strobe device 30 has a strobe main body 32 having a window 31 with a built-in strobe light emitting section at the top front. The flash body 32 is attached to the camera
5 for pivotal support. A pair of straight cam grooves 51 are formed on both side surfaces of the flash main body 32 along the longitudinal direction thereof.

A pair of recesses 52 having a shape in which the vicinity of the opening is narrowed are formed in the camera body 10 below a pair of cutout grooves 21 formed in the flash body housing section 20.
A pair of first arms 54 having a flange 53 at the lower end
Is inserted movably in the vertical direction of the concave portion 52. The coil spring 55 as the first urging means is provided in the recess 5.
2 are disposed below the flange portion 53 of the first arm 54, and urge each of the first arms 54 in the direction of movement (upward).

The second arm 56 is provided in the strobe main body storage section 2.
0, one end (lower end) of which is located near the upper end of the first arm 54.
7, a cam engaging pin 58 is rotatably supported at the other end (upper end) and is engaged with the cam groove 51 of the flash main body 32. The pair of torsion springs (not shown), which are the second urging means, are connected to the first and second arms 54 and 5.
It is wound around each of the rotation shafts 57 located between the six. Each of these torsion springs has a pin (not shown) having one end projecting horizontally from each of the second arms 56.
, And the other end is inserted into each of the first arms 54. A torsion spring (not shown) attached to the rotation shaft 57 urges the second arm 56 around the rotation shaft 57 as a fulcrum, for example, clockwise. The coil spring 55 has a sufficiently large spring force as compared with the torsion spring attached to the rotating shaft 57.

In each of the cam grooves 51 formed in the strobe main body 32, the end near the shaft 35 side where the cam engaging pin 58 of the second arm 56 is located just before the strobe main body 32 stands up is the same as the above. The second arm 56 is located at a position where the angle between the moving direction of the cam engaging pin 58 and the second arm 56 is 90 °. Here, the angle is defined as (C) in FIG.
The angle (θ) at which the direction of movement of the cam engaging pin 58 (dashed line) and the line extending from the cam engaging pin 58 in the axial direction of the second arm 56, as shown in FIG.

Next, the operation of the flash device according to the second embodiment will be described with reference to FIGS. 1 and 7A to 7D.

A pair of torsion springs (not shown) wound around the rotating shaft 57 in a state where the strobe main body 32 shown in FIG.
And a biasing force for rotating the pair of second arms 56 clockwise about the rotation shaft 57 is applied.
Further, the cam engagement pins 58 at the other ends of the pair of second arms 56 are connected to the cam grooves 51 separated from the shaft 35 of the flash body 32.
It is located at the end (left end).

When the lock release switch 35 shown in FIG. 1 is actuated in the state of FIG. 7A, the lock claw 33 of the strobe body storage section 20 and the strobe body 32
Is disengaged from the lock claw engaging portion 34. When the engagement is released, a pair of second arms 56 formed by a pair of torsion springs (not shown) wound around the rotation shaft 57.
A biasing force acts to rotate the clockwise direction about the rotation shaft 57 as a fulcrum. This urging force is applied to the strobe main body 32.
Does not directly act on the shaft 35 (center of rotation), but acts indirectly according to the principle of leverage, so that the rotational force of the second arm 56 acts as a rotational force about the shaft 35 of the strobe main body 32. The movement of the cam engaging pin 58, which is the working end of the second arm 56, that is, the movement along the cam groove 51 of the strobe main body 32 is inevitable. In other words, if the working end of the second arm 56 does not move,
The rotational force of the arm 56 is not transmitted as the rotational force of the flash main body 32.

More specifically, the engagement between the lock claw 33 and the lock claw engaging portion 34 of the strobe main body 32 is released, and a pair of torsion springs (not shown) wound around the rotation shaft 57 are provided. ), The urging force for rotating the pair of second arms 56 in the clockwise direction with the rotation shaft 57 as the fulcrum acts, and the rotational transmission force to the strobe main body 32 due to the rotational force of the second arm 56 and the second From the relationship with the movement of the cam engaging pin 58, which is the working end of the arm 56, along the cam groove 51, the strobe main body 32 has a shaft 35 mounted on the camera main body 10 as shown in FIG. It pivots clockwise around the pivot center, and finally pivots to the upright position shown in FIG. 7C, whereby the pair of second arms 5
The cam engaging pin 58 which is the working end of the cam groove 51 extends from the end (left end) of the cam groove 51 away from the shaft 35 of the strobe main body 32 to the end of the cam groove 51 (right end) close to the shaft 35 along the cam groove 51. ) Is reached. The position where the cam engaging pin 58 reaches the end (right end) of the cam groove 51 is set at a position where the angle (θ) between the axial direction of the second arm 56 and the cam groove 51 is 90 °. Then, the rotation transmission force to the flash main body 32 due to the rotation of the second arm 56 becomes effectively zero. With respect to the unit rotation angle of the second arm 56, the flash body 3
The rotation angle of 2 decreases with standing and finally reaches zero.
In other words, as a result of the rotation force of the flash body 32 about the shaft 35 as the center of rotation approaching zero as much as possible, the flash body 3
The impact on the camera body 10 due to the rotation of the shutter 2 can be reliably reduced.

In the above-described strobe device 30, the rotation force of the second arm 56 and the movement of the cam engaging pin 58, which is the working end of the second arm 56, along the cam groove 51 formed on the strobe body 32, raise the strobe body 32. Power can be increased. As a result, there is no need to increase the spring force for standing up, which is advantageous in terms of space.

On the other hand, in order to store the strobe main body 32 in the strobe main body storage section 20 of the camera body 10 from the upright state, the top of the upright strobe main body 32 shown in FIG. Press. At this time, a pair of first
Since the arm 54 is urged upward by a pair of coil springs 55, when the strobe main body 32 is pressed, the first arm 54 engages with the cam groove 51 of the strobe main body 32 as shown in FIG. Due to the pressing force of the second arm 56 having the combined cam engagement pin 58 at the upper end, the second arm 56 moves downward against the urging force of the coil spring 55. as a result,
Since the cam engaging pin 58 of the second arm 56 moves from the right end to the left end of the cam groove 51 along the cam groove 51 of the strobe main body 32, the above-described strobe main body 3
The movement opposite to the upright movement of Step 2 occurs, and the strobe body 32 can be smoothly housed in the strobe body storage section 20 of the camera body 10 by applying a relatively small pressing force to the strobe body 32.

As described above, according to the second embodiment, the impact on the camera body 10 due to the rotation of the strobe main body 32 can be reliably reduced, and the strobe main body 32 can be raised to a target position. Further, the operation of the strobe main body 32 from the standing state to the stowed state can be smoothly performed only by applying a relatively small pressing force to the strobe main body 32.

(Third Embodiment) FIGS. 8A to 8D
FIG. 11 is a cross-sectional view showing a process in which the strobe main body moves from a storage position to a standing position in the strobe device according to the third embodiment, and a process in which the strobe main body moves from the standing position to the storage position by pressing. The same members as those in FIG. 2 described above are denoted by the same reference numerals, and description thereof will be omitted.

The strobe device 30 has a strobe main body 32 having a window 31 with a built-in strobe light emitting section at the upper front. The flash body 32 is attached to the camera
5 for pivotal support. A pair of linear cam grooves 61 are formed on both side surfaces of the flash main body 32 along the longitudinal direction thereof.

The pair of first arms 62 are located in a pair of cutout grooves (not shown) formed in the strobe main body storage section 20, and one end (lower end) of the camera body 1 at the inner surface of the cutout groove.
0 is rotatably supported via a rotating shaft 63, and has a flange portion 64 at the other end (upper end). A pair of torsion springs (not shown), which are first urging means, are wound around the rotation shaft 63 located between the inner surface of the notch groove and the first arm 62, respectively. These torsion springs have a camera body 1 having one end on the inner surface of each of the notched grooves.
The first arm 62 is engaged with a pin (not shown) projecting horizontally from the other end, and the other end is inserted into each of the first arms 62. A torsion spring (not shown) attached to the rotation shaft 63 urges the first arm 62 in, for example, a counterclockwise direction about the rotation shaft 63 as a fulcrum.

A second arm 66 having a spring housing hollow portion 65 communicating with the lower end surface is located in a pair of cutout grooves (not shown) formed in the strobe main body housing portion 20, and is located at one end (lower end) opening side. The first arm 62 has a flange portion 64 side which is rotatably engaged with the first arm 62 and is movably engaged in one direction, and the other end (upper end) of which is engaged with the cam groove 61 of the strobe main body 32. It has an engagement pin 67. Second
The coil spring 68, which is a biasing means, is connected to the second arm 66.
Of the first arm 62 in the hollow portion 65
Each of the second arms 66 is disposed so as to be located above and urges each of the second arms 66 in the moving direction (obliquely upward).

The end of each of the cam grooves 61 near the shaft 35 where the cam engaging pin 67 of the second arm 66 is located just before the strobe main body 32 stands up, in the moving direction of the cam engaging pin 67. And the second arm 66 are positioned at an angle of 90 °. Here, the angle is an angle (θ) at which the moving direction (dashed line) of the cam engagement pin 67 shown in FIG. 8 intersects with a line extending from the cam engagement pin 67 in the axial direction of the second arm 66. Means

The coil spring 68 has a sufficiently strong spring force as compared with a not-shown torsion spring.

Next, the operation of the flash device according to the third embodiment will be described with reference to FIGS. 1 and 8A to 8D.

In a state where the flash main body 32 shown in FIG. 8A is stored in the flash main body storage section 20, a pair of torsion springs (not shown) wound around the rotating shaft 63.
A biasing force is applied to rotate the pair of first arms 62 in the counterclockwise direction with the rotation shaft 63 as a fulcrum, and the pair of second arms movably engaged with the first arms 62 in one direction. The cam engaging pin 67 at the other end of the arm 66 is located at the end (right end) of the cam groove 61 close to the shaft 35 of the flash main body 32.

When the lock release switch 35 shown in FIG. 1 is actuated in the state of FIG. 8A, the lock claw 33 of the strobe main body storage section 20 and the strobe main body 32
Is disengaged from the lock claw engaging portion 34. When this engagement is released, a pair of first arms 62 formed by a pair of torsion springs (not shown) wound around the rotation shaft 63.
An urging force acts to rotate the pair of second arms 66 movably engaged with the first arm 62 in one direction in the counterclockwise direction about the rotation shaft 63 as a fulcrum. Since this biasing force does not directly act on the shaft 35 (center of rotation) of the strobe main body 32 but acts indirectly by the principle of leverage,
In order to cause the rotational force of the second arm 66 to act as a rotating force about the shaft 35 of the strobe main body 32, movement of a cam engaging pin 67, which is the working end of the second arm 66,
That is, the movement of the flash main body 32 along the cam groove 61 is inevitably involved. In other words, unless the working end of the second arm 66 moves, the rotational force of the second arm 66 is not transmitted as the rotational force of the strobe main body 32.

Specifically, the engagement between the lock claw 33 and the lock claw engaging portion 34 of the strobe main body 32 is released, and a pair of torsion springs (not shown) wound around the rotation shaft 67. ), The urging force for rotating the pair of first arms 62 and the pair of second arms 66 movably engaged with the first arm 62 in one direction in the counterclockwise direction about the rotation shaft 67 as a fulcrum. When actuated, the above-described strobe light is obtained from the relationship between the rotation transmitting force to the strobe main body 32 due to the above-described rotation force of the second arm 66 and the movement of the cam engaging pin 67, which is the working end of the second arm 66, along the cam groove 61. Body 32
Pivots clockwise about a shaft 35 pivotally attached to the camera body 10 as shown in FIG. 8B, and finally pivots to a standing position shown in FIG. 8C. I do. Accordingly, the cam engagement pin 67, which is the working end of the pair of second arms 66, is moved from the end (right end) of the cam groove 61 near the shaft 35 of the strobe main body 32 along the shaft 3 along the cam groove 61.
And reaches the end (left end) of the cam groove 61 distant from the fifth groove. Since the second arm 66 is urged obliquely upward by the coil spring 68 housed in the hollow portion 65, the right end of the first arm 62 with respect to the first arm 62 during the standing operation shown in FIG. The first arm 62
In conjunction with the rotation of. The cam engaging pin 67 is in the cam groove 61.
Since the position reaching the end (left end) is set at a position where the angle (θ) between the axial direction of the second arm 66 and the cam groove 61 is 90 °, the strobe light generated by the rotational force of the second arm 66 is used. The rotation transmitting force to the main body 32 is effectively zero. With respect to the unit rotation angle of the second arm 66, the rotation angle of the strobe main body 32 decreases with rising, and finally becomes zero. In other words, the strobe main body 3 having the shaft 35 as the center of rotation
As a result, the rotational force of the flash unit 32 approaches zero and the impact on the camera body 10 due to the rotation of the strobe body 32 can be reliably reduced.

Further, in the above-described strobe device 30, when the rotational force of the second arm 66 and the cam engaging pin 67, which is the working end thereof, are formed on the strobe body 32 and move along the cam groove 61, the strobe body 32 rises. The force can be increased. As a result, there is no need to increase the spring force for standing up, which is advantageous in terms of space.

On the other hand, in order to store the strobe main body 32 in the strobe main body storage section 20 of the camera body 10 from the upright state, the top of the upright strobe main body 32 shown in FIG. Press. At this time, a pair of second
Since the arm 54 is urged obliquely upward by a pair of coil springs 68 housed in the hollow portions 65, when the strobe body 32 is pressed, the strobe body 3
The second arm 66 having a cam engaging pin 67 at the upper end engaged with the second cam groove 61 moves obliquely downward against the urging force of the coil spring 68 as shown in FIG. . As a result, the cam engagement pin 67 of the second arm 66
Moves from the left end to the right end of the cam groove 61 along the cam groove 61 of the strobe main body 32, a movement opposite to the above-described rising operation of the strobe main body 32 occurs, and a relatively small pressing force is applied to the strobe main body 32. By simply applying pressure, the strobe can be smoothly housed in the flash body housing section 20 of the camera body 10.

As described above, according to the third embodiment, the impact on the camera body 10 due to the rotation of the strobe main body 32 can be reliably reduced, and the strobe main body 32 can be raised to a target position. Further, the operation of the strobe main body 32 from the standing state to the stowed state can be smoothly performed only by applying a relatively small pressing force to the strobe main body 32.

[0060]

As described above in detail, according to the present invention, it is possible to provide a strobe device capable of surely reducing the impact on the camera body at the time of completion of standing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a camera in which a strobe device according to a first embodiment of the present invention is incorporated.

FIG. 2 is a cross-sectional view illustrating a process of moving the strobe main body from a storage position to a standing position in the strobe device and a process of moving the strobe main body from the standing position to the storage position by pressing.

FIG. 3 is an enlarged sectional view of the strobe device of FIG. 1;

FIG. 4 is a schematic diagram for explaining movement of each member in the strobe device of FIG. 1;

FIG. 5 is a diagram showing a vector starting from a cam engagement pin during movement of the cam groove.

FIG. 6 is a view showing a vector starting from a cam engaging pin engaged with a cam groove at a standing position of the strobe main body.

FIG. 7 is a cross-sectional view showing a process in which the strobe main body of the strobe device according to the second embodiment of the present invention moves from the storage position to the standing position, and a process in which the strobe main body moves from the standing position to the storage position by pressing.

FIG. 8 is a cross-sectional view illustrating a process in which the strobe main body of the strobe device according to the third embodiment of the present invention moves from the storage position to the standing position, and a process in which the strobe main body moves from the standing position to the storage position by pressing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Camera main body, 20 ... Strobe main body storage part, 30 ... Strobe device, 32 ... Strobe main body, 35 ... Shaft, 36 ... Arm, 37 ... 1st rotation shaft, 38 ... 1st torsion spring, 40, 58, 67 ... Cam engaging pin, 41 ... Guide member, 42 ... Second rotating shaft, 43 ... Second torsion spring, 45,51,61 ... Cam groove, 54,62 ... Second arm, 55,68 ... Coil spring, 56 , 66 ... second arm, 57, 63 ... rotating shaft.

Claims (7)

[Claims] 1. A pop-up type flash device which rotates between a standing position in a use state and a storage position in a non-use state with respect to a camera body, wherein at least a strobe light emitting portion rotatably supported by the camera body. A strobe body having one end rotatably attached to the strobe body and an arm having a cam engaging portion at the other end; and a movably attached to the camera body, wherein the cam engaging portion of the arm includes A guide member having a cam portion to be engaged, an arm urging means for urging the arm in the rotation direction thereof, and a guide member urging means for urging the guide member in the movement direction. A cam portion of the guide member has a shape for rotating the strobe main body in an erecting direction in response to rotation of an arm by the arm urging means, and erects the strobe main body. At a portion corresponding to the cam engaging portion of the arm end at the immediately preceding position, the angle at which the moving direction of the cam engaging portion moving along the cam portion and the axial direction of the arm intersect is approximately 90 ° or 90 °. A strobe device characterized by having a shape that: 2. An angle at which a moving direction of the cam engaging portion and an axial direction of the arm intersect is smaller than 90 ° at a storage position of the strobe main body, and the strobe main body is turned in an upright direction. The strobe device according to claim 1, wherein the strobe device is configured to increase with rotation of the arm and decrease with movement of the guide member in a direction opposite to a biasing direction. 3. The guide member according to claim 1, wherein the moving direction of the cam engaging portion and the axial direction of the arm intersect through the arm when the strobe main body is moved from the standing position to the storage position. 2. The strobe device according to claim 1, wherein the strobe device moves against the guide member urging means so as to change the angle of 90 degrees or 90 degrees. 4. A pop-up type flash device that rotates between a standing position in a use state and a storage position in a non-use state with respect to the camera body, wherein the flash body is rotatably supported by the camera body and has at least a strobe light emitting unit. And a first arm movably attached to the camera body; one end rotatably attached to the first arm; and the other end engaged with the cam portion. A second arm having a cam engaging portion, a first urging means for urging the first arm in a moving direction thereof, and a second urging means for urging the second arm in a rotating direction thereof. And a cam portion of the strobe main body having a shape for rotating the strobe main body in a rising direction in accordance with the rotation of the second arm by the second urging means, and Standing up the strobe At a position corresponding to the cam engaging portion of the second arm end at the immediately preceding position, the angle at which the moving direction of the cam engaging portion moving along the cam portion and the axial direction of the second arm intersect is approximately 90. A strobe device characterized in that the strobe device has a shape of 90 ° or 90 °. 5. The device according to claim 5, wherein the angle at which the moving direction of the cam engaging portion intersects the axial direction of the second arm is smaller than 90 ° at the storage position of the strobe main body, and rotates the strobe main body in the upright direction. The strobe device according to claim 4, wherein the strobe device is configured to increase with the rotation of the second arm and decrease with the movement of the first arm in a direction opposite to the biasing direction. . 6. A pop-up type flash device that rotates between a standing position in a use state and a storage position in a non-use state with respect to a camera body, wherein the flash body is rotatably supported by the camera body and includes at least a strobe light emitting unit. And a first arm rotatably attached to the camera body; one end of the first arm is rotatable together with the first arm and is movable in one direction. A second arm having a cam engaging portion engaged with the cam portion at the other end; a first urging means for urging the one arm in a rotation direction thereof; And a second urging means for urging the second arm in a direction in which the second arm is separated from each other in the moving direction, wherein the cam portion of the strobe main body is engaged with the first arm by the first urging means. 2nd arc combined The strobe body is turned in the upright direction in accordance with the rotation of the flash unit, and the cam is formed at a position corresponding to a cam engaging portion of the second arm end just before the strobe body is raised. A strobe device having a shape in which the angle at which the moving direction of the cam engaging portion moving along the portion intersects the axial direction of the second arm is approximately 90 ° or 90 °. 7. The angle at which the moving direction of the cam engaging portion and the axial direction of the second arm intersect is smaller than 90 ° at the storage position of the strobe main body, and rotates the strobe main body in the upright direction. The strobe device according to claim 6, wherein the strobe device is configured to increase with the rotation of the second arm and decrease with the movement of the second arm in the direction opposite to the biasing direction. .